318 EFI and carb

Why not look into a FiTech or Holley sniper to replace the carb?
Well, you can buy a used Holley for $50. $35 later you have a rebuild kit, and they work quite well.
The FI stuff is nice, but for a possible 10% increase in mileage, $1,000 is a lot to spend.
If I did have the money just laying around, I would probably go FI on a daily driver.